Adjustable cutter head



May 5, 1925.

R. L. CARTER ADJUSTABLE CUTTER HEAD Filed June 19. 1924 Patented May ldi,

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Appncanon area rune 1a, 1924i. serial Novartis To all eo/loin t vimj/ conce/1%.'

Be it lnown that l, RAY L. CARTER, a citizen of theUnited `States, residing at Syracuse, in the county of Onondaga and State ofNew York, have invented certain new and usefull lmproveinents in `Adjustable Critter Heads, of which the following is a specification. i ,I

This invention relates to improvements in cutter-heads, designed for holding the tools carried by the rotatable spindles of shapers, routers, and milling-machines, and has for its object to prov-ide novel and simplei'neans for clamping and 'adjustably holding a plurality of cutters rigid to the shaft or spindle, which rotates the head.

. A further object is to provide a cutterhead for shapersl and the like, comprising spaced discs or collars, between which the cutters may be clamped, said -discs `being movable towards and from each other for ac- .commodaiting cutters of different lengths, as well as two or more cutters disposed end to end; said discs being slidable on the spindle and ony guide-posts that parallel the spindle, the said posts passing axially through the cutters.` i t further object isfto provide novel means for adjusting the guide-posts iadiallyrela-V tively to` the! spindle, for regulating the depth of cuts made by the cutters while the head-is: being rotated, as well as for maintaining the normal depth of the cuttings when the cutters are reduced in diameter by grinding or wearing away l; the said adjust- .ing means being arranged to position `the posts and: cutters relatively to the axis of rotation, as well as to each other, for effecting uniform cutting bythe several spaced cutters.. i i

dnd a further object to provide an adjustable head of the class, by which tools having cuttiiig-blades of different shape, contour Vand diameter may be applied to each guide-post, for effecting fancy or ornamental. cuts. j

` lfhewarious features and parts of the invention will be understood from the detailed description which follows, and by reference to the accompanying drawing, in which.-

Figurefl is a top-plan view of the stationary table, above which the adjustable cutterhead is positionedl j Fig. 2 is a broken side elevation and central `vertical section; the section being taken on. line 2--2 ofFig. l.

, Fig. 3 is a face view of the uppermost disc.

Fig. t is a face view of the adjusting disc. Fig. 5 is a horizontal section, taken on line .5-5 of Fig. 2. Fig. 6 is a top-plan view of the cutter-head shown in Fig. l. Fig. 7 is a plan view of the adjustable disc of Fig. Lgf showing the disc rotated in the direction for effecting the maximum adjustment of the cutters and their supports. Fig. Sis a horizontal section, similar to Fig. 5; showing the relative positions ofthe cutter-supporting posts, when the adjusting disc is rotated, as shown in 7. Fig.` Sis a central vertical section, similar toFig. 2; showing an assembly of several pairs of cutters for effecting ornamental cuts. And Fig. l() is a plan view; showing the differently shaped' cutters of Fig. 9. i

ln the drawing, 2 represents the usual stationary circular table of a portable shaping machine, which supports` the work, and 3 the power-driven shaft; the top end of said shaft which projects above the table, preferably being reducedfand threaded, as at 3', to receive a clamping nut 3a.

j My improved cutter-,head comprises similar top and bottom discs or collars 4C and 5, both of which are provided with smoothbore central openings, as lf-, to receive the spindle 3 of the shaft, and said discs have similar oppositely arranged radial slots, as ift-5"'. The discs 4 -5 are partially supported, and are held from independent rotary movement on the spindle 3', by similar guide-posts 6, which are disposed in the corresponding slots la-li, parallcl` to the spindle; the said 'posts being adjnstably `mounted on pins 7, the latter being driven tightly into radial holes 5 of the lowerinostdisc, which aline with and span the slots 5a, as shown in Figs. l, 5 and 8. rlhe posts 6 are slidable on the pins 7 by inea-ns of `holes 6', for effecting `their ad-i `justinent radially, asinay be understood by comparing Figs. 2 and S. The adjustment of the posts 6 is effeotedby a disc or plate 8, which is bored out Vcentrally to receive the spindle 3', upon which it rotates, and said disc preferably rests upon the collar 5., The disc 8 is provided with similar eccentric slots f, through which the posts 6 pass, and by ineanslof which said posts may be moved towards and away from the spindle 3.. The disc S is also provided with similar concentric oppositely arranged Slots 8a, through best seen in Figs l andQ.

which set-screws 8b are inserted, and then screwed into the collar 5, for holding` the disc S in various adjusted positions.

Referring to Figs. l, 2, 9 represents one form of standard cutters, which are used in connection with my adjustable head. These cutters are preferably arranged in pairs, and each is provided with four or five integral arms or blades 9, which are disposed substantially tangent to theaxesof t-he cutters, as shown inFigs. l and l0'. rl`he cutters 9 are all bored out centrally to receive `the posts G, and one or more of the cutting blades 9 project beyond the peripheries of the collars land the disc 8, as The depths of the shaping or routing' cuts are regulated by the extent of this projection, and may be increased or decreased, 1by the rotation of the disc 8, for elliecting the radial movements of the guide-posts 6, asexplained. Ordinarily, butone of the blades 9 of each cutter performs `the shaping-work, and when vthe head is rotated at high speed, these oppositely arranged single'blades 9 effect eX- `tremely smooth cuts. In case one of the Yblades 9 becomes broken, or worn away by grinding until it is too short 1to effect vthe required cut, the operator removes the nut 3a, and Jthe collar 4, and slides the defective cutterupwardly on its post 6 until it is free from the spindle and post. The operator may then restore the broken or worn cutter .to the post, .in a ananner to dispose one .of the remaining perfect blades 9 in the cutting posi-tion, as shown. ln this vay, `the cutters may be shifted or readjusted from time to time, until all ofthe blades are worn out. 'Tlhe cutters 9 are shown mounted upon fthe disc 5, .and are held rigidly in place by the Adise l and nut 3a, .as shown in Figs. l, 2 and rG. By this construction and arrangeanent, the .disc il serves as a guide and sup- .port for the free top-ends of the posts G, and ,also Iperforms .the function of a clamping washer; .and when the nut 3 is screwed down tightly, the cutters and clamping),l parts are held rigidly against the shoulder' 8" of, and are rotatable as Aone part lby, the shaft Any tendency Aof ithe cutters *9 fto rotate on the posts 6, due to entraordinary strains induced by the work, is overcome 'by the corresponding;v linwardly facingl idle blades 9', which closely straddle the spindle 3, as shown in 1.

ln Fig'. 5 the dotted circles indicate the normal vdiameters of the cutters of l? l and 9. when new. As the blades of the cut- .ters naturally .become shorter, due to frequent grinding, it :becomes necessary to more the cutters outwardly, in .order to effect the normal depths of the cuts. T his may be accomplished readily, quickly and accurate by the following means: The operator first logosens the nut '3a and set-screws 8b, land then rotates the plate 8, as from the position shown in Figs. l and l, to that shown in Fig. 7. This effects the outward radial movement of the posts G, as shown in Fig. 8, from which it may be seen that, even though the cutters 9 have been ground or worn away to a relatively great extent (see dotted circles Fig. 8), their cutting blades may still effect the same relative depth of cut. By the same method of adjustment, new cutters of relatively small. diameters may be operatively applied to the head and perforn'i their u'orlr.

yIn Fig. 9 is shown three cutters mounted upon each post G, wherein the uppermost and lo'wermost tiers correspond in shapeand size, and .whose cutting edges 9n are of the same contour; while the middle tier, comprises cutters having convex blades, as shon'n in Fig. 2. llfhen several differently formed cutters are thus applied -to the posts ti, a great variety of fan-cy or ornamental cuts may be effected in a ready and simple .manner.

My improved cutter-head is extremely simple, and notI only eliiects a greateconomy in the operation and maintenance of the shapers, but includes several novel and desirable features of adjustment and convenience, not heretofore flniownand used. 'lfhe present device comprises relatively few parts, all of which are readily accessible, and are not liable to wear out or become impaired or rendered inaccurate vby ordinary shop use. Furthermore, my cutter-heads do not require skilled operators, but may turn out satisfactory work, when operated bythe well-known handy rmen usually employed in industrial plants.

Having thus described my invention, what l claim, is*

l. ln a cutter-head, the combination with a stationary table, a driven lthreaded spiiulle, and a pair of similar cutters said cutters being,` bored out axially, of a pair of similar' collars having registering;` radial slots adj-ustably mounted on said spindle, said colr lapted to bc spaced for receiving therebetween the said cutters, means for moving; said callers, means ,engaging the bores o l tile cutters and said radial slots for controlling the cutters radially relatii'ely to said spindle. and means for clamping' tl e collars to said spindle.

A. cutter-head, including); a threaded spindle, circular centrally perforated inem bers mounted on said spindle, said members having' correspond-ine' radial slots. cutters disposed between said members harina' radial cutting-blades adapted to be successively projected beyond the peripheries o'i' said members and lawine` central openings adapted to register with the said slots, guide pests mounted for radial movement in slots and passino` axially through said said lll() lihl ters, means interposed between said ineinbers foi'iadjnstine' said cutters radially rela- Alli tively to the spindle, and meansforvclampi ing said members to said spindle.

3. A "cutter-head including a' threaded spindle, circular centrally perfo-rated inembers mounted on said spindle, said members having corresponding radial slots, cutters disposed between said `members having radial cuttingblades adapted to be lsuccessvely projected beyond the peripheries of said members and having` central openingsv adapted to register with the said slots, guideposts mounted for radial movement in said slots, pins carried by the lowermost member for adjustably supporting said posts, means interposed between said members for adjusting said cutters radially relatively to the "spindle, and means for clamping saidmem- Vbers to said spindle.

p 4; A cutter-head including a threaded spindle, spaced circular members adj ustably` mounted on'said spindle, said members having oppositely disposed radial slots, cutters boied out axially disposed between said members, the bores ofsaid cutters regis-v tering with the slots of said members, posts passing` through said slots and said cutters, a rotatable disc disposed concentrically between said members and having eccentric slots to receive said posts adapted for moving the posts radially relatively to the spindle for varying the depths of the cuts effected by said cutters, and means for clamping i said 'members and related parts rigidly to said spindle for movement as one part.

5. The combination with a stationary table, a power-driven spindle projecting above the table, and a plurality of cutters each formed with a iiumher of cutting blades, of a pair of perforated collars spaced to receive said cutters mounted on said spindle and having corresponding lradial slots disposed at the opposite sides of the spindle, guide-posts disposed in said slots parallelto the spindle and passing axially `through the corresponding cutters, means for n'ioving said posts radially relatively to each other for 'ary'ing the depths of the culs effected by said blades, means for; ad- `justably securing said postsjin the slots of one of said collars, and means 'for clamping said collars to the spindle and for preventingI rotation of the cutters o n said posts.

G. The combination `with a powendriven shaft having a reduced threaded spindle, and a pair of axially bored cutters having radial cutting blades, of a pair of circular clamping men'ibers mounted on said spindle adapted to be spaced to receive said cutters therebetween, said members having oppositely arranged radial slots adapted to reg` ister with the `bores of the cutters, guideposts passing through said members and saidv cutters, radially disposed pins carried bers together and for effect-ing the rotation of said parts b v said shaft.

TQ The combination with a stationary work table, a driven shaft passing through said table and ,ha-ving a threaded spindle projecting above the table, and a pair of cutters having central openings and having radial cutting blades adapted to effect the cutting work, of a pair of similar perforated discs mounted eoncentrically on said spindle adapted to be spaced for receiving therebetween the said cutters, said discs having corresponding radial slots registering with the openings in said cutters, guide-posts passing axially through said cutters and through the slots of said discs parallel to said spindle, pins spanning the slots in the lowermost disc `upon which said posts are slidable, means `for moving said posts and cutters ra* dially, and means for clamping said discs and said cutters together for operation by said spindle as one part.

\ 8. The combination with a power-driven shaft having a reduced threaded spindle at one end, of a cutter-head comprising a pair of circular perforated clamping members of the same diameter disposed one above the other on said spindle, said members having corresponding oppositely arranged radial slots, radial pins spanning the slots of the lowermost' member, guide-posts slidably mounted on said pins and extending through the corresponding slots of said members, a disc perforated centrally for receiving said spindle mounted on the lowermost member, said disc having eccentric slots through which said posts pass and by means of which said pestis may be moved radially relA atively to said spindle, means for locking and holding said disc in various adjusted positions, a cutter mounted concentrically on each post and having radial cutting blades, one blade of each cutter adapted to project beyond the peripherics of said niemhers for effecting the cutting \voi'l ,'said cut* ters adapted to be shifted on said posts `for successively bringing the seiieral blades into the cutting position, and means for clamp ing said members tothe spindle and for holding said cutters from rotation ou said posts.

9. The combination with a shaft having a reduced threaded spindle at one end, of a hziviiip; concentric slots, screws passing through said concentric slots and threaded into the :idjzieeiit member, guide-posts pas ing through the slots of the members, siid dise, find the Coii'espoiidiiig, cutters7 meiiiis for slidably securing the lower ends of sii'id posts in the slots of the lowermost member,

Vand a mit applied to the free end of said spindle for elaiiipiiig` the members tightly to said spindle and to said cutters.

Iii testimony Whereoi- I affix my signature.

RAY L. CARTER. 

